Method and apparatus for automatic restoration detection and automatic restoration of optical communication system

An automatic restoration method of optical communication system, comprising:

• after a link fails in an optical communication system, centering a failure state by a first automatic restoration launching station adjacent to the failed link;
• sending, by the first automatic restoration launching station, an automatic restoration detection message whose optical power is compatible with a safety standard to a second automatic restoration launching station at the opposite side of the failed link;
• in response to receiving an automatic restoration request message from the second automatic restoration launching station, determining, by the first automatic restoration launching station, the link has been repaired in two directions between the first automatic restoration launching station and the second automatic restoration launching station;
• sending an automatic restoration confirmation message whose optical power is compatible with a safety standard to the second automatic restoration launching station;
• and
• switching to a normal working state by the first automatic restoration launching station;
• the method further comprising:
• starting automatic restoration timing by the first automatic restoration launching station after entering the failure state;
• sending, by the first automatic restoration launching station, a first detection optical signal whose optical power is compatible with the safety standard to the second automatic restoration launching station, and waiting for a preset time;
• in response to detecting a second detection optical signal, turning on, by the first automatic restoration launching station, an auxiliary pump source on the link from the first automatic restoration launching station to the second automatic restoration launching station.

An automatic restoration method of optical communication system, comprising:

• after a link fails in an optical communication system, entering a failure state by a second automatic restoration launching station adjacent to the failed link;
• in response to receiving an automatic restoration detection message from a first automatic restoration launching station, determining, by the second automatic restoration launching station, that the link has been repaired in a direction from the first automatic restoration launching station to the second automatic restoration launching station;
• sending an automatic restoration request message whose optical power is compatible with the safety standard to the first automatic restoration launching station;
• in response to receiving an automatic restoration confirmation message from the first automatic restoration launching station, determining, by the second automatic restoration launching station, the link has been repaired in two directions between the first automatic restoration launching station and the second automatic restoration launching station;
• and
• switching to a normal working state by the second automatic restoration launching station;
• wherein the sending the automatic restoration request message comprises:
• turning on, by the second automatic restoration launching station, a main optical channel to the first automatic restoration launching station;
• loading an identification signal representing the automatic restoration request message on the main optical channel, and
• adjusting the main optical channel power to be compatible with the safety standard.

An automatic restoration method of optical communication system, comprising:

• after a link fails in an optical communication system, entering a failure state by a second automatic restoration launching station adjacent to the failed link;
• in response to receiving an automatic restoration detection message from a first automatic restoration launching station, determining, by the second automatic restoration launching station, that the link has been repaired in a direction from the first automatic restoration launching station to the second automatic restoration launching station;
• sending an automatic restoration request message whose optical power is compatible with the safety standard to the first automatic restoration launching station;
• in response to receiving an automatic restoration confirmation message from the first automatic restoration launching station, determining, by the second automatic restoration launching station, the link has been repaired in two directions between the first automatic restoration launching station and the second automatic restoration launching station;
• and
• switching to a normal working state by the second automatic restoration launching station;
• the method further comprising:
• in response to receiving a first detection optical signal from the first automatic restoration launching station, turning on, by the second automatic restoration launching station, an auxiliary pump source on the link from the second automatic restoration launching station to the first automatic restoration launching station;
• and
• sending, by the second automatic restoration launching station, a second detection optical signal whose optical power is compatible with the safety standard to the first automatic restoration launching station, and waiting for a preset time.

A method for automatic restoration detection of optical communication system after a link fails, comprising:

• detecting, by a first automatic restoration launching station adjacent to the failed link, an identification signal, loaded by a second automatic restoration launching station at the opposite side of the failed link, on a main optical channel whose optical power is compatible with a safety standard, wherein the identification signal represents an automatic restoration detection message;
• if the identification signal is detected, determining, by the first automatic restoration launching station, that the link has been repaired in the direction from the second automatic restoration launching station to the first automatic restoration launching station;
• wherein the identification signal is an intensity modulated signal;
• and
• wherein the identification signal is loaded on the main optical channel by controlling the wave motion of the intensity of pump light of an optical amplifier of the automatic restoration launching station at one side to enable signal light of the main optical channel to generate a wave motion in compliance with the wave motion of the intensity modulated signal.